(19)
(11)
EP 1 230 734 A1
(12)
(43)
Date of publication:
14.08.2002
Bulletin 2002/33
(21)
Application number:
00975644.6
(22)
Date of filing:
23.09.2000
(51)
International Patent Classification (IPC)
7
:
H03K
17/92
,
H03F
3/217
(86)
International application number:
PCT/US0040/975
(87)
International publication number:
WO 0122/585
(
29.03.2001
Gazette 2001/13)
(84)
Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI
(30)
Priority:
23.09.1999
US 155635 P
11.01.2000
US 480274
(71)
Applicant:
AudioLogic, Incorporated
Boulder,Colorado 80301 (US)
(72)
Inventor:
MELANSON, John, Laurence
Austin, TX 78746 (US)
(74)
Representative:
Jackson, Richard Eric et al
Carpmaels & Ransford,43 Bloomsbury Square
London WC1A 2RA
London WC1A 2RA (GB)
(54)
ADAPTIVE DEAD TIME CONTROL FOR PUSH-PULL SWITCHING CIRCUITS